Thanks Sy,

This is exactly what I was looking for and I have now bookmarked the
starting page for the design book. Lots of data there. From what
others have said it looks as if one can be within about half or one
third of these tolerances if one is very careful and has some good
luck.

This should be very helpful to a lot of us recreational metalworkers.

Mil specs and handbooks often have a lot of valuable information.
Finding the mil spec can be a problem.

Thanks again,
Dan



(Sy) wrote in message

Hello Dan,
There is a military standard for drill hole size tolerances. It is
AND10387. See http://www.bjg-design.com/designbook/holest.htm
Also look at http://www.bjg-design.com/designbook/drilld.htm for drift
tolerance for drill holes. Also look up
http://www.bjg-design.com/designbook/formhsiz.htm for positional
tolerances.
Sy